casing fishing tap 套管打捞公锥
The paper analyses the current transformer (ct) that secondary winding possesses casing tap, and its secondary connector wiring fault's influence on the ct changing rate.
文章分析了二次绕组带有抽头的套管电流互感器(CT)，其二次端子接线错误对CT变比的影响。
The taper mill tap is a special tool for opening up a passage in casing.
锥形铣锥是用来套管打通道的专用工具。
The milled tap pup joint is a special tool used for opening up a passage in casing.
铣锥短接是用来套管打通道的专用工具。
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